netdev - Re: [fw filter]: Broken! fw mark based tc class selection not working

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Date:	Mon, 14 Sep 2015 15:04:01 -0700
From:	Cong Wang <cwang@...pensource.com>
To:	Jamal Hadi Salim <jhs@...atatu.com>
Cc:	Akshat Kakkar <akshat.1984@...il.com>,
	netdev <netdev@...r.kernel.org>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Stephen Hemminger <stephen@...workplumber.org>
Subject: Re: [fw filter]: Broken! fw mark based tc class selection not working

On Mon, Sep 14, 2015 at 5:28 AM, Jamal Hadi Salim <jhs@...atatu.com> wrote:
> On 09/11/15 20:00, Cong Wang wrote:
>>
>> On Fri, Sep 11, 2015 at 3:24 PM, Akshat Kakkar <akshat.1984@...il.com>
>> wrote:
>
>
>> Hmm, I didn't know that before either. Looks like my tp->init change
>> breaks it.
>>
>> Could you try the following patch?
>>
>
> I would just make init() empty for this classifier (return 0?).
> If someone wants to add classids ids, change() is available.
> The most common (efficient) use case is what Akshat shows.
> So even the check in the classify should optimize for that i.e
> if (head == NULL)
>     do old method
> else
>     ...

That is exactly the original code. But it is not readable at all,
at least I still missed it when I touched the tp->init() part. :(
Having a boolean doesn't harm anything.
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